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(No Model.)

W. W. BRADLEY.

WATCH CASE PENDANT.

No. 403,511. Patented May 21, 1889.

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UNITED STATES PATENT OFFICE.. n

VILLIAM IV. BRADLEY, OF NEIVPORT, KENTUCKY, ASSIGNOR TO .lOllN C. DUEBER, OE SAME PLACE.

WATCH-CASE PENDANT.

SPECIFICATION forming part of Letters Patent No. 403,51 1, dated May 21, 1889.

Application filed January 25, 1889. Serial No. 297,564. (No model.)

To all whom it may concern.;

Be it known that I, WILLIAM W. BRADLEY, a citizen of the United States, residing at Newport, in the county ot' Campbell and State of Kentucky, have invented certain new anduseful Improvements in lVatclrCase Pendants; and I do declare the following to be a full, clear, and exact description of the invention, reference being had to the aceompanyin g drawings, which form a part of this specification.

This invention relates to those watch-case pendants which are provided with longitudinally-shiftable push pins or stems that operate both the winding and setting mechanisms 5 and my improvement consists in retaining an ungrooved push pin in either its advanced or retracted position by the grasp of a frictionclutch :fitted within a chamber oi' the pendant. This grasp oi the clutch is so firm as to cause it to revolve in unison with the ungrooved pin or stem, while at the same time a sufficient exertion of torce will overcome the frictional hold of the clutch and permit the desired shifting ot' said stem; but said clutch is so retained by a keeper or other device as to be incapable of longitudinal movementwithin the pendant-chamber. This clutch is retained in its proper position. by a tubular nut that screws into the pendant-chamber and bears upon a collar of: said clutch, as hereinafter more fully described.

In the annexed drawings, Figure 1 is an enlarged sectional elevation showing the various members of my watch-case pendant separated from each other. Fig. 2 is an axial section showing said parts applied to the pendant and the push-pin advanced to engage with the winding mechanism of the watch. Fig. 3 is a similar section, but showing said pin retracted to operate the handnsetting mechananism.

A represents a portion of a watch-case center or ring, and B is a pendant secured thereto in any suitable manner, said pendant having at its inner end a smooth axial bore, C, that opens into a screw-threaded chamber, D, concentric with said bore, but ot somewhatlarger diameter, thereby forming an annular bearn ing, d, at the inner end of said chamber. The opposite or outer end. of this chamberis open.,

so as to admit the clutch and its keeper, as will presently appear.

E represents that portion of the push pin or stem which traverses the pendant-bore C, the inner end ot said stem having a customary square arbor, F,to operate either the winding or setting mechanism in the usual manner.

G is a reduced portion or spindle of the stem, which spindle is perfectly smooth, being free from flanges or grooves, and has at its outer end a screw, g, that engages with the crown or head or knob II.

c is an annular shoulder at the junction of the stem E and spindle G.

I is a tubular nut or keeper adapted. to be screwed into the pendant-chamber D, said'nut being niclied. at its outer end, as at 'L 1f', to permit the ready application of a suitable turning implement. The interior of this nut `is smooth or unthreaded and tits snugly around the conical portion .I of the clutch, which member .l is normally cylindrical, but is slotted longitudinally in a number et places, as at j, and then compressed, so as to have the desired irictional grasp around the push-pin. These slots extend almost to a collar, K, at the inner end of the clutch.

The above describes a pendantto be applied to an open-tront watch-case, the various parts being iitted together, as seen in Figs. 2 and 3, which illustrations show that the stem E occupies the bore C, while the spindle G traverses the clutch J, the grasp of the latter being sufficient to prevent said stein accidentally slipping in either direction. Furthermore, these illustrations show that the collar K rests upon the bearing d, and is retained thereon by properly turning thenut I, which should be so adjusted as to allow the clutch .I to revolve in unison with the stem, but not to permit any longitudinal shifting of the clutch within the chamber of the pendant. Owing to this construction and arrangement the push pin or stem normally occupies the position seen in Fig. 2, thereby causing the arbor E to be thrown in gear with any approved form of watch-winding mechanism. Therefore, when the crown or head His turned, the spring-clutch J revolves freely within the chamber D, on account ot said clutch being so tightly engaged with the spindle G, which free TOO turning of the clutch enables the watch to be wound in the usual manner; but when the hand-setting mechanism is to be operated the crown H is grasped and pulled with suicient force to overcome the hold of the clutch upon the spindle, which act advances the push-pin and causes it to assume the position seen in Fig. 3, reference to which illustration shows that the shoulder e is now in contact with the end of collar K. Consequently this collar acts as a stop that limits the advance of the pushpin, and thereby indicates that the arbor F of said pin is in gear with the hand-setting mechanism of the watch, which mechanism is operated by properly turning the crown H, during which act the spring-clutchJ again revolves freely within the pendant-chamber. After the hands have been set sucient pressure is exerted against the crown H to overcome the grasp of the spring-clutch and allow the stem to be pushed back to its normal or winding position.

I claim as my invention- 1. A chambered watch-case pendant provided With an un grooved longitudinally-shiftable push pin or stem, in combination with a clutch fitted Within said chamber and grasping an ungrooved stem, so as to revolve in unison therewith, a keeper that prevents longitudinal sliding of said clutch, and a stop that limits the outward pull of said stem, substantially as described.

2. A watch-case pendant, as B, having a screw-threaded chamber, D, and bearing b, in combination with the longitudinally-shiftable push-pin E e G, clutch J j K, and a tubular keeper or nut, I, that engages with said chamber and holds said clutch against said bearing d, as herein described.

In testimony whereof I aiix my signature in presence of two witnesses.

WILLIAM W. BRADLEY. 

